Episode 54 of "Alias"
s03e10 Remnants
Title: Remnants
Original Air Date: 12/07/2003 on ABC
Director: Jack Bender
Writer: Jeff Pinkner
Guest Stars: Merrin Dungey (Allison Doren), Mark Bramhall (Lazarey), Paul Ganus (Desk Attendant), Mark Galasso (NSC Agent #2), Tony Guma (Ben), Joey Nader (Bellhop), Gerard O'Donnell (Agent Scrimm), David Cronenberg (Dr. Brezzel), Bradley Cooper (Will Tippin), Sean Casey (NSC Agent #1), Ivo Lopez (Gamboni)
Plot Outline:
The identity of the mysterious "St. Aidan" forces Sydney to pull a stunned Will out of witness protection. But the pursuit sends the two old friends on a collision course with Allison -- the woman who ruined both their lives. Meanwhile, a zealous Lindsey arrests Jack and Vaughn as conspirators in Sydney's escape from NSC custody, Sloane, still under pressure from Lindsey, puts a plan in motion to eliminate Sydney, and Dr. Brezzel has an unpleasant run-in with Sark.